import socket
import os
#xiaorui.cc
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
#s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
s.bind(('0.0.0.0', 10090))

while True:
    data, address = s.recvfrom(1024)
    s.sendto(data, address)
    #address.close()